Calculator
Savings Goal Calculator
Explore a savings target, timeline, and regular contribution.
- Transparent assumptions
- Detailed annual table
- No account required
Your calculation
Savings Goal Parameters
Complete the inputs below to calculate your required savings schedule. Results update automatically.
YOUR ILLUSTRATION
Required Contribution Plan
- Required Monthly Deposit
- $638.21
- Total Contributions
- $43,292.60
- Total Interest Earned
- +$6,707.20
- Target Achieved
- $49,999.80
- Portfolio Breakdown
- 10.0% initial
76.6% deposits
13.4% interest
SCHEDULE
Annual Savings Progression
Amounts shown in USD.
← Scroll the table horizontally to see every column.
| Year | Starting balance | Annual deposits | Interest earned | Ending balance |
|---|---|---|---|---|
| Year 1 | $5,000.00 | $7,658.52 | +$466.43 | $13,124.95 |
| Year 2 | $13,124.95 | $7,658.52 | +$882.12 | $21,665.59 |
| Year 3 | $21,665.59 | $7,658.52 | +$1,319.06 | $30,643.18 |
| Year 4 | $30,643.18 | $7,658.52 | +$1,778.38 | $40,080.08 |
| Year 5 | $40,080.08 | $7,658.52 | +$2,261.20 | $49,999.80 |
Mathematical Model
Understanding the Savings Goal Equation
Reaching a defined savings target requires balancing initial capital, regular periodic deposits, compound interest, and investment horizon. The core formula decomposes the target into two distinct parts: compound growth of initial principal, and regular periodic annuities.
Common questions
Frequently asked questions
How is the required monthly savings deposit calculated?
The calculator uses the future value of an annuity formula (Annuity Due for beginning-of-period deposits, Ordinary Annuity for end-of-period). It first calculates how much your starting balance will naturally grow via compounding, subtracts that from your target goal, and solves for the regular periodic contribution needed to bridge the remaining gap.
What is the difference between beginning and end of period deposits?
Depositing at the beginning of each month gives that contribution an extra month of interest compounding, resulting in a slightly lower required periodic payment compared to depositing at the end of the month.
Does this calculator account for inflation and taxes?
This baseline calculator displays nominal growth based on your estimated annual return. If saving in a taxable account, taxes on interest or capital gains will reduce your net return, meaning you may need to target a slightly higher deposit.
What happens if my starting balance is already enough?
If your initial balance compounded over the chosen time horizon meets or exceeds your goal, the required deposit drops to $0.00, and the tool reflects the projected future value of your initial principal.
References and further reading
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